A Solution Is Prepared by Mixing 45 $\circ$ C?


A)8

question 29

Multiple Choice

A solution is prepared by mixing 45.68 g of carbon disulfide (CS₂,76.13 g/mol) with 16.43 g of acetonitrile (CH₃CN,41.06 g/mol) .By what factor is the vapor phase enriched in CS₂ at 25 ^$\circ$ C?

• A)8.97
• B)1.67
• C)5.99
• D)3.99
• E)1.47

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Definitions:

Preconscious

The part of the mind containing contents that are not in immediate awareness but can be accessed easily.

Reality Principle

A psychoanalytic concept referring to the capacity of the mind to assess the external world and act upon it appropriately, as opposed to acting on the pleasure principle.

Pleasure Principle

A psychoanalytic concept that describes people's instinctual seeking of pleasure and avoidance of pain to satisfy biological and psychological needs.

Ego

A part of the psyche that mediates between the conscious, the unconscious, and the reality by deploying defense mechanisms.